I would agree with that statement assuming that you are considering both of them a full sport, in eSports you are both actively moving your arms etc whilst using communicative skills, much like you would be in any team sport such as football etc. You are also using your brain so I would say that eSports are a complete sports. Chess is very similar in that you are using your brain to work out what you are going to do next and it is a game of mind power.